<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script>
function A()
{
	this.abc=12;
}
A.prototype.show=function()
{
	alert(this.abc);
}
//继承A
function B()
{
	A.call(this);
}
B.prototype=A.prototype;

var obj=new B()
obj.show();
//alert(obj.abc);
</script>
</head>

<body>
</body>
</html>
